1622226636 has 48 divisors (see below), whose sum is σ = 4211020800. Its totient is φ = 540067536.

The previous prime is 1622226589. The next prime is 1622226637. The reversal of 1622226636 is 6366222261.

1622226636 is a `hidden beast` number, since 1 + 622 + 2 + 26 + 6 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1622226636.

It is not an unprimeable number, because it can be changed into a prime (1622226637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81661 + ... + 99563.

It is an arithmetic number, because the mean of its divisors is an integer number (87729600).

Almost surely, 2^1622226636 is an apocalyptic number.

It is an amenable number.

1622226636 is an abundant number, since it is smaller than the sum of its proper divisors (2588794164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1622226636 is a wasteful number, since it uses less digits than its factorization.

1622226636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18755 (or 18747 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 1622226636 is about 40276.8747049718. The cubic root of 1622226636 is about 1174.9981315196.

Adding to 1622226636 its reverse (6366222261), we get a palindrome (7988448897).

The spelling of 1622226636 in words is "one billion, six hundred twenty-two million, two hundred twenty-six thousand, six hundred thirty-six".